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G. B. COOPER.

SHEET METAL ROOFING PLATE.

No. 372,787. Patented Nov. 8 "1887.

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CHARLES B. COOPER, OF NEW YORK, N. Y.

SHEET-METAL ROOFING-=PLATE.

SPECIFICATION forming part of Letters Patent No. 372,787, dated November 8, 1887.

Application filed September 9, 1886. Serial No. 213,078.

To all whom it may concern:

Y Be it known that I, CHARLES B. CoornR, of the city, county, and State of New York, have invented certain new and useful Improvements in Sheet-Metal Roofing-Plates, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings.

My invention relates to improvements in metal roofing, the improvements residing in a novel construction and combination of the plates or shingles which compose the same.

The main object of the invention is to pro vide an inexpensive and ornamental metal roofing in which the plates or shingles shall have rounded, pointed, or similarly-shaped ends so separated from one another as to present an ornamental and substantial appearance. To accomplish this in a simple and effective manner the plates are formed with a depending flange around the lower ends and at their sides, the width of such flange gradually diminishing toward the upper end of the plates. In order to lay these plates smoothly and to avoid making provision for the seams where the plates overlap, I avoid the use of the ordinary raised scams or joints and form along the side edges of the depending flange suitably-corrugatedinterlocking seams,which are below the plane or surface of the plates. hen such plates are laid, the seams, being under the plates or below the plane of their surface, are not visible, and one tier or layer forms a smooth and even surface upon which to lay the next.

Another desirable object which I accomplish is to combine with the ornamental roofingplates, formed with rounded or similarlypointed ends, supplemental plates or pieces of smaller size, by the use of which a much smaller number of the larger plates is required in covering a given surface. In other words, when plates or shingles of this general character are cut away at the corners to form pointed and separated ends, it would be necessary (were such plates alone used) that one layer of plates should overlap the next lower layer considerably more than when rectangular plates are employed. To avoid this I use the supplemental pieces above referred to, placing them under the larger plates in such a (No model.)

manner that they take the place of and'serve the same purpose as the corners or squared ends of the ordinary rectangular plates.

These and other features of novelty in my invention will be more fully described by reference to the accompanying drawings, where- Figure 1 is a plan View of several of my improved roofing-plates, exhibiting the manner in which they are assembled when applied to a roof. Fig. 2 is an enlarged perspective view of. one of the supplemental pieeesused in conjunction with the pointed plates. Fig. 3 is a section on line 00 w of Fig. 1. Fig. 4. is a section on line y y of Fig. 1, and Fig. 5 is a central longitudinal section of one of the plates.

The plates or shingles (designated by the letters A-A) have the lower corners cut away or rounded off,so as to form pointed ends of any desired shape. A flange, B, depends from the side and lower or exposed ends, and gradu ally diminishes in width or depth on each side or edge of the plate from the lower end to ward the upper end. Along one side of the plate, and forming an extension from the depending flange, is what may be designated a flap, O,which is properly corrugated to form a lockseam in conjunction with the suitablyformed edge or flange of the next adjacent plate in the same layer. I prefer to form the part 0 as shown-that is to say, with two parallel corrugations, a b, the former of which is inclined toward the flange B and forms with the other corrugation a gutter, c. In the flat edge d of the part 0 are perforations c,through which the nails are driven that secure the plates upon the roof. The opposite side or edge of each plate A is bent under and inwardly, as seen at B, after being first bent to form the flange B,above described. This edge serves as a catch when passed up between the corrugation a and flange B of an adjacent plate, and, together with such corrugation, forms a lock-seam. These plates are laid in tiers or rows, the plates of each tier interlooking with one another and overlapping those of the next tier below, as indicated in Fig. 1; but, owing to the pointed shape of the plates, it would be obviously necessary to lay each tier of plates so far over the tier below it, in order to properly cover the roof and to prevent the water from finding its way up under the lower edge of the plates, as to involve a' considerable waste of material. To avoid this,and to economize in the number of plates, as well as to give a further ornamental appearance to the roof, I employ small supplemental pieces of sheet metal, E, which are placed under the larger plates A at and below the points where the edges of the rounded or pointed ends of two adjacent plates begin to diverge, the said pieces thus covering such portions of the roof as would be protected by the corners of rectangu ar plates in case such were used.

The supplemental pieces E are strips, preferably of the same material as the plates A. The lateral edges are turned up to form flanges F G, that on one edge, as F, being curved t6 conform to the shape of the plate under which it is laid, while the other, as G, is straight and shorter, being only required to form a gutter in which the corrugated flap O lies.

The lower or exposed ends of the pieces E are rounded, pointed, or otherwise similarly shaped; and to prevent the capillary action of the water, which would ensue if the pieces lie directly upon the plates A, the lower edges are turned down to form a flange, H, which gradually diminishes in width from the point or end of the piece to the points along the side edges at or near which the flanges of the superposed plates A rest. The pieces E may be of such size that their ends are on aline with the plates A or near thereto.

Each of the plates A may have one of these pieces E permanently secured to it; or the said pieces may be entirely independent. In the former case the curved flange F is soldered to the under side of the flange B of a plate A, and in such position that the corrugated extension G of said plate will lie in the gutter formed by the two flanges F and G. \Vhen this is done, no further means of securing the pieces are necessary. It is manifest that when the pieces E are secured to the plates A by soldering,thc flanges F may be dispensed with and the edges of the pieces E may be soldered directly to the flanges B of the plates. \Vhen the pieces E are not attached to the plates,thcy are inserted under the plates in the manner described, and may be secured to thc sheathing by one or more nails driven through the edges of the corrugated parts 0. By the use of these supplemental pieces it is only necessary that the plates of any given tier should project over those of the next lower through a space about equal to or even less than the length ofthe tapered or pointed portion ofthe plates.

In order to provide a guide for laying the plates, and to prevent flooding under the lower edges thereof, the corrugations ff are formed. The plates are then laid in such manner that the flanges on the lower ends lie closely along the lower sides of these corrugations. As a further protection against the intrusion of] water under the plates, the upper portion of each plate may be provided with one or more transverse corrugations, h h, which serve as dams.

My invention is not limited to the precise forms of plate herein shown and described, and particularly may the lower pointed end thereof be otherwise shaped and other forms of seams be employed.

\Vhat I claim as new is- 1. A sheet-metal roofing-plate provided at its lower end and along the side edges adjacent to such end with a depending flange, which flange gradually diminishes in depth along the opposite side edges of the plate from the lower end to the upper end thereof, whereby similar plates can be laid to form successive layers, in which the lower ends of plates of an upper layer shall overlap the plates of a lower layer and lie in close contact therewith.

2. A sheetmetal roofing-plate provided at its lower end with a depending flange, and also having similar depending flanges at its side edges adjacent such end, which diminish in depth from the lower end of the plate to the upper end thereof and are bent relatively to each other, whereby the opposite side edges of similar plates may be united to form a lockseam located below the main surface of the plate, substantially as set forth.

3. A sheet metal roofing-plate provided at its lower end and side edges with a depending flange diminishing in depth from the lower to the upper end of the plate, portions of said' flange along the opposite sides of the plate being relatively shaped to form a lock located beneath the plane of the plate and adapting adjacent plates to be secured together.

at. A sheet-metal roofing-plate provided at its lower end and side edges with a depending flange diminishing in depth from the lower end of the plate to the upper end thereof, such flange having at one side of the plate the corrugated flap O and at the other side of the plate the catch D.

5. In combination with roofing-plates having pointed or tapered ends and constructed to be laid to form continuous layers, supplemental pieces adapted to be connected with the pointed or tapered ends of such plates and to cover the space between the pointed or tapered ends of adjacent plates.

6. In combination with metallic roofingplates having tapered or pointed ends provided with depending flanges, supplemental pieces provided with upturned flanges and adapted to be overlapped by the lower ends of the plates and to cover and protect the space between the tapered or pointed ends thereof, substantially as set forth.

CHAS. l3. COOPER.

Witnesses:

Iton'r. F. GAYLORD, FREDERICK C. BARBER.

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